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.Management Sciences
Category: Fuels and Combustion
Which of the following is a primary fuel ?
A. Blast furnace coke
B. Gasoline
C. Natural gas
D. Wood charcoal
Very ______________ coals are completely devoid of cokability i.e., it is non-coking ?
A. Young
B. Mature
C. Both A & B
D. Neither A nor B
Increase in ash content of blast furnace coke_________________?
A. Reduces its consumption in the furnace
B. Increases its consumption in the furnace
C. Does not affect its consumption in the furnace
D. Decreases its hardness and abrasion resistance
Stack (chimney) height in a big thermal power plant is dictated by the___________________?
A. Pollution control aspect
B. Draught to be created
C. Limitation of constructional facilities
D. None of these
Which is the heaviest fuel gas out of the following ?
A. Blast furnace gas
B. Coke oven gas
C. Water gas
D. Carburetted water gas
Too much of excess air in combustion results in high___________________?
A. Fuel consumption for the same heat load
B. Stack gas temperature
C. Percentage of oxygen in flue gases
D. All A., B. and C.
During combustion of gaseous fuels, deficiency of air_________________?
A. Lengthens the flame
B. Tends to shorten the flame
C. Does not affect the flame length
D. Increases the flame temperature
Lurgi gasifier (high pressure gasifier) as compared to Kopper Totzek gasifier (atmospheric pressure gasifier) produces __________________?
A. Higher amount of methane
B. Lower amount of hydrogen
C. Both A. and B.
D. Higher amount of both methane and hydrogen
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